Door-bolt.



No. 810,918. PATENTED JAN. 30, 1906.

E. W. CUNNINGHAM.

DOOR BOLT.

APPLICATION FILED MAY 6, 1905.

2 SHEETSSHEET 1.

PATENTED JAN. 30, 1906.

E. W. CUNNINGHAM.

DOOR BOLT.

PYLIOATION FILED MAYB, 1905.

2 SHEETS-SHEET 2 UNITED STATES PATENT ornion.

DOOR-BOLT.

Specification of Letters Patent.

Patented Jan. 30, 1906.

Application filed May 6, 1905. Serial No. 259,094.

To all whom it may concern.-

Be it known that I, EDGAR W. CUNNING- HAM, a citizen of the UnitedStates, residing at Roselle, in the county of Union and State of NewJersey, have invented certain new and useful Improvements in Door-Bolts,of which the following is a specification, reference being had thereinto the accompanying drawings, in which Figure 1 is a front view; Fig. 2,an end elevation; Fig. 3, a plan view; Fig. 4, a vertical sectional viewshowing the bolt in its locked position; Fig. 5, a view showing the boltapplied to a mortise-lock; Fig. 6, a detail showing the bolt embodied ina rim-lock adapted to be secured to the outer surface of a door; Fig. 7,a detail showing the invention used as a mortise-bolt; Fig. 8, aperspective view of the device designed for use as a door-securer; Fig.9, a detail view showing this latter form of the device applied to adoor; Fig. 10, a vertical sectional view of the form of device shown inFig. 8; Fig. 1 1, arear elevation thereof, and Fig. 12 a bottom view.

One of the many objects of this invention is to providea'spring-actuated bolt with operating means of such construction thatwhen said means is operated to move the bolt against the spring-pressurethe bolt will be locked in position against the action of said sprinAnbther object of the invention is to provide a spring-actuated bolt ofsimple construction which will be durable, easlly operated, andefficient and wherein the bolt will be locked against thespring-pressure by the actuating means whether the spring is tending toforce the bolt inward or outward.

Another object of the invention is to provide a bolt of simpleconstruction which may be adapted for many uses.

Referring to the various parts by numerals, 1 designates the boltcasing, in which the bolt 2 is mounted to reciprocate. Within the casingand near its forward end the bolt is provided with an annular collar 3,and between said collar and the forward end of the casing is confined acoil-spring 4, said spring normally holding the bolt within the casing,as shown in dotted lines in Fig. 1. Pivoted on the rear end of the boltis a short upward and inward extending link 5. On the boltcasing ispivoted an operating-lever 6, whose inner end is pivotally connected tothe upper end of the link 5, the outer end of said lever being providedwith a forward projecting finger-piece 7. The upper side of the casing 1is slotted, as shown in Figs. 3 and 4, to permit of the connection ofthe link 5 with the bolt and the operating-lever. The lever is sopivoted on the casing that the finger-piece 7 will contact with thecasing when the inner end of the lever has reached a point slightlyabove a line drawn through the center of the pivot of the lever and thepivot of the link 5. The object of this is to prevent the springthrowing inward the bolt 2. It will be readily seen that in thisposition of the parts the spring, acting through the bolt, tends toforce upward the link, and as said link is held by the lever 6 the boltwill be retained in its outer position. When it is desired to retractthe bolt, the lever 6 is thrown on its pivot until the upper end of thelink 5 is below the-line drawn through the pivot of the lever and thelink, thereby permitting the spring to force the bolt inward. When thebolt is in its inner position, the parts as sume the position indicatedin dotted lines in Fig. 1. When the device is constructed as shown inFigs. 1 to 4, inclusive, the spring tends to force the bolt to its innerposition and the operating mechanism locks the bolt in its outerposition against the tension of the spring. It will also be noted thatthe bolt is held against rotation and that it will be impossible tothrow the bolt back by any in ward pressure on the outer end thereof, sothat it cannot be retracted except by manipulating the operatingmechanism. The bore of the casing is preferably enlarged toward theforward end thereof to receive the spring and the collar and iscontracted from said forward end to said rear end, the rear end being ofsubstantially the same diameter as the diameter of the rear end of thebolt in order that the bolt may be centered at its rear end, andpractically all friction between the bolt and the inner wall of thecasing will be avoided. In Fig. 5 the" invention is shown as applied toa mortise-lock, the bolt 2 being adapted to be projected from the edgeof the door and the finger-piece 7 a being arranged to move in a slot 8,formed in the door-plate 9.

In Fig. 6 the invention is shown as arranged in what is known as arim-lock.

This form of lock is adapted to be secured to the face of the door. Inthis arrangement the fingerpiece 7 b is arranged to move in a slot 11,formed in the outer wall of the lockcasing, and the bolt 2 is adapted tobe proj ected through the end wall of the lock-cas- In Fig. 7 theinvention is shown as arranged for a mortise-bolt, the finger-piece 7being arranged to reciprocate in a slot 12, formed in a small face-plate13, the bolt 2 being adapted to be projected through the edge of thedoor.

In Figs. 8 to 12, inclusive, the invention is shown as arranged for useas a door-holding boltthat is, a bolt adapted to be secured to the lowerend of the door and to be projected downward to engage the floor andhold the door in its adjusted position. In this form of the device aspring 14 is arranged to force the bolt outward, as shown clearly inFig. 10, and the lever 15 and link 16 are arranged to retract the boltagainst the action of the spring. The lever and the link are so arrangedthat when the bolt is retracted and the spring compressed the point ofconnection between the link and the inner end of the lever will beoutside of a line drawn through the pivot of the link on the bolt andthe center of the pivot of the lever, so that the tension of the springwill be acting to force said point of connection outward. Thefinger-piece 17 of the lever will be then forced against the side of thecasing 1 and a downward or outward movement of the bolt will beprevented. It will of course be readily understood that when the outerside of the lever is raised sufficiently to throw slightly inward thepoint of connection between the link and the lever the spring willproject the bolt beyond the casing and move the operating-link and leverto the position shown in Fig. 10. This form of the device constitutes avery eflicient door-holding means which may be foot-operated when placedat the lower edge of the door.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is

1. A door-bolt comprising a casing, a reciprocable bolt therein, aspring in the casing and adapted to force said bolt in one direction, alink pivoted to said bolt and lying within the casing, anoperating-lever pivoted on said casing, and having one of its endsextending into the bolt-cavity, said inward-extending end being pivotedto the free end of the link, a finger-piece on the opposite end of saidlever, and stops adapted to be engaged by said finger-piece at theextremes of its movements, one of said stops bein so located that whenit is engaged by the finger-piece the spring will be compressed and thepivotal point between the link and the lever will be on one side of aline running through the pivot of the lever and the con-- nectionbetween the link and the bolt, whereby the pressure of the spring willhold the finger-piece against the stop and the movement of the bolt willbe prevented.

2. A door-bolt comprising a casing, a reciprocable bolt therein, aspring surrounding said bolt and normally holding it retracted, a linkpivoted to said bolt and lying within the casing, an operating leverpivoted on said casing, and having one of its ends extending into thebolt-cavity, said inward-extending end being pivoted to the free end ofthe link, a finger-piece on the opposite end of said lever, and stopsadapted to be engaged by said finger piece at the extremes of itsmovements, one of said stops being so located that when it is engaged bythe finger-piece the spring will be compressed and the bolt will beprojected beyond the casing and the pivotal point between the link andthe lever will be on one side of a line running through the pivot of thelever and the connection between the link and the bolt, whereby thepressure of the spring will hold the finger-piece against the stop andthe movement of the bolt will be prevented.

In testimony whereof I hereunto affix my signature, in the presence oftwo witnesses, this 4th day of May, 1905.

EDGAR W. CUNNINGHAM.

Witnesses:

WM. R. DAVIS, W. H. RUBY.

